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Taiwan Semiconductor Corporation TLD8S11AH
- Part No.:
- TLD8S11AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
TLD8S11AH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,063
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Product details
Overview
TLD8S11AH from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-218AB package, rated for 11.0 V working stand-off voltage, 12.2–13.5 V breakdown voltage at 5 mA, 18.2 V clamping voltage at 363 A peak impulse current, and 6600 W peak pulse power (10/1000 µs), designed for automotive load dump surge protection in 12 V/24 V battery systems.
For engineers reviewing the TLD8S11AH datasheet, TLD8S11AH pinout, TLD8S11AH application, or TLD8S11AH equivalent, key selection criteria include clamping voltage under high-current surge, junction temperature capability up to 175 °C, compliance with ISO 7637-2 and ISO 16750-2, and DO-218AB mechanical robustness for under-hood deployment.
Technical Context
The TLD8S11AH employs junction passivation optimized design technology to sustain 175 °C junction temperature operation, meeting AEC-Q101 qualification for automotive reliability. Its unidirectional configuration provides asymmetric conduction-low forward voltage (≤1.8 V at 100 A) and high reverse blocking (≤10 µA leakage at 11.0 V).
It delivers 6600 W non-repetitive peak impulse power with 10/1000 µs waveform and 5200 W with 10/10000 µs waveform, supported by 0.8 °C/W junction-to-case thermal resistance when mounted on an ideal heatsink-enabling effective thermal management during transient events like load dump.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 12.2 / 13.5 V at 5 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 18.2 V at 363 A - Clamping voltage limiting downstream circuit stress during worst-case surge |
| PPPM (10/1000 µs) | 6600 W - Peak surge energy absorption capacity matching ISO 7637-2 Pulse 5a requirements |
| TJ max | 175 °C - Enables placement in high-temperature engine bay environments without derating |
| RθJC | 0.8 °C/W - Enables efficient heat transfer to heatsink, critical for sustained surge duty cycles |
| IR @ VWM | ≤10 µA at 25 °C - Ensures minimal standby leakage in always-on automotive modules |
Pinout & Package
Package: DO-218AB surface-mount molded plastic case per JEDEC standard; cathode band marked on body; matte tin-plated leads; moisture sensitivity level 1 (J-STD-020); weight ≈2.691 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to ground or low-side return; conducts during reverse surge to clamp voltage |
| Cathode | Reverse blocking terminal | Connected to protected line (e.g., battery rail); defines polarity and standoff behavior |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| 175 °C junction rating | Supports direct mounting near high-heat sources (e.g., alternators, ECUs) without external thermal derating |
| ISO 7637-2 & ISO 16750-2 compliant | Guarantees performance against standardized automotive load dump and supply transients |
| DO-218AB mechanical robustness | UL 94V-0 flammability rating and JESD 201 Class 2 whisker resistance ensure long-term solder joint integrity |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Lighting Module Surge Suppression |
|---|---|
Use Scenario: Protects ECU 12 V input rail from alternator load dump surges exceeding 120 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse-polarity transients while maintaining low-leakage standby state. Use Value: Limits rail voltage to ≤18.2 V during 363 A surge, preventing damage to MCU, CAN transceivers, and analog front-ends. | Use Scenario: Shields LED driver ICs in headlamp modules from battery line transients during ignition and jump-start events. IC Role / Device Role / Timing Role: Fast-response clamping device placed upstream of DC/DC converters and LED current regulators. Use Value: Absorbs 6600 W peak power without degradation, preserving luminance stability and avoiding false fault detection. |
| Body Control Module (BCM) Battery Interface | Start-Stop System Voltage Rail Protection |
Use Scenario: Secures BCM power input against repeated micro-surge events during frequent vehicle restarts and accessory switching. IC Role / Device Role / Timing Role: High-reliability unidirectional suppressor with 175 °C TJ rating for under-dash mounting. Use Value: Maintains <10 µA leakage at 11.0 V across full temperature range, minimizing quiescent current drain in sleep mode. | Use Scenario: Safeguards start-stop system control electronics during cranking-induced voltage sags and recovery spikes. IC Role / Device Role / Timing Role: Transient shunt element with 0.8 °C/W RθJC enabling rapid thermal recovery between stop/start cycles. Use Value: Withstands ≥100,000 load dump events per ISO 16750-2 Annex C, ensuring lifecycle durability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Lower PPPM (400 W), SMA package, 17.1 V VC @ 23.5 A | Not suitable for ISO 7637-2 load dump; limited to low-energy ESD/surge | Select only for non-automotive, low-power industrial I/O protection |
| SMCJ11A | Same DO-214AB package, 600 W PPPM, 19.0 V VC @ 31.3 A, no AEC-Q101 | Lacks automotive qualification and 175 °C rating; lower surge margin | Acceptable for cost-sensitive commercial automotive accessories where full qualification is waived |
Compared with SMAJ11A and SMCJ11A, the TLD8S11AH delivers 16.5× higher peak power handling and AEC-Q101 validation-making it the only option qualified for primary battery rail protection in engine control and safety-critical modules.
Availability
TLD8S11AH is available at Aetrix Electronics and suitable for automotive ECU power protection, LED lighting module surge suppression, and start-stop system voltage rail hardening requiring stable component supply across extended production lifecycles.
Supply support for TLD8S11AH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and automotive-qualified components since 1979.
The TLD8SxxAH series was developed specifically for high-energy automotive load dump protection, targeting replacement of legacy TVS arrays with single-device solutions offering superior thermal performance and AEC-Q101 compliance.
FAQ
What is the clamping voltage of the TLD8S11AH under maximum surge current?
The TLD8S11AH has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak impulse current of 363 A with a 10/1000 µs waveform. This value is measured at TA = 25 °C and ensures downstream circuitry remains within safe operating limits during ISO 7637-2 Pulse 5a load dump events. The TLD8S11AH maintains this clamping performance across its full operating temperature range due to its low temperature coefficient of VBR (0.072 %/°C).
Is the TLD8S11AH qualified for automotive use?
Yes, the TLD8S11AH is AEC-Q101 qualified and meets ISO 7637-2 and ISO 16750-2 surge immunity standards for automotive applications. It supports junction temperatures up to 175 °C and passes JESD 201 Class 2 whisker testing, confirming suitability for under-hood deployment. The TLD8S11AH is explicitly intended for automotive load dump protection per Taiwan Semiconductor's product documentation.
What package type does the TLD8S11AH use, and what are its key mechanical features?
The TLD8S11AH uses the DO-218AB surface-mount package, defined per JEDEC standards with UL 94V-0 flammability rating. Key mechanical features include matte tin-plated leads compliant with J-STD-002 solderability, polarity indicated by cathode band, and weight of approximately 2.691 g. The package supports automated pick-and-place and reflow assembly, and its thermal resistance (RθJC = 0.8 °C/W) enables effective heatsinking in high-power surge scenarios.
How does the TLD8S11AH differ from bidirectional variants like TLD8S11CAH?
The TLD8S11AH is unidirectional, providing low forward voltage (≤1.8 V at 100 A) and reverse blocking up to 11.0 V, making it ideal for DC power rail protection. In contrast, TLD8S11CAH is bidirectional and symmetrical-suitable for AC signal lines or differential bus protection-but exhibits higher leakage and lacks forward conduction capability. Both share identical VBR, VC, and PPPM ratings, but their circuit roles and placement topology differ fundamentally.
What is the maximum steady-state power dissipation of the TLD8S11AH?
The TLD8S11AH has a steady-state power dissipation (PD) rating of 8 W at TA = 25 °C, as specified in its Absolute Maximum Ratings table. This value applies under continuous DC or low-frequency conditions-not transient surge events-and must be thermally managed via PCB copper area or heatsinking. Derating is required above 25 °C ambient, following the power derating curve in Figure 1 of the official datasheet for the TLD8S11AH.
TLD8S11AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-218AB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 363A
- Power - Peak Pulse:
- 6600W (6.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
TLD8S11AH FAQ
1.How can I place an order for TLD8S11AH through Aetrix?
Please submit a Request for Quotation (RFQ) for TLD8S11AH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLD8S11AH reliable?
The price and inventory of TLD8S11AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLD8S11AH is usually 5 days.
3.What payment methods are accepted for TLD8S11AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLD8S11AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLD8S11AH?
TLD8S11AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLD8S11AH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLD8S11AH?
For technical support, including TLD8S11AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLD8S11AH requirements.
6.How does Aetrix verify that TLD8S11AH is sourced from the original manufacturer or authorized distributors?
All TLD8S11AH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLD8S11AH meets industry standards.
7.What is the process for return or replacement of TLD8S11AH?
All TLD8S11AH units undergo pre-shipment inspection (PSI). If there is an issue with TLD8S11AH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLD8S11AH part is unused and in its original packaging.
Return procedure for TLD8S11AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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